U.S. patent application number 16/970903 was filed with the patent office on 2020-12-10 for osteotomy device and operation method therefor.
The applicant listed for this patent is Suzhou Microport Orthorecon Co., LTD.. Invention is credited to Fangqiu HU, Yandong SUN, You WU, Kaiyu ZHAO.
Application Number | 20200383690 16/970903 |
Document ID | / |
Family ID | 1000005050588 |
Filed Date | 2020-12-10 |
United States Patent
Application |
20200383690 |
Kind Code |
A1 |
SUN; Yandong ; et
al. |
December 10, 2020 |
Osteotomy Device and Operation Method Therefor
Abstract
Disclosed is an osteotomy device, comprising an osteotomy plate
(10), a fixing plate (20) and an adjusting structure (30), wherein
the osteotomy plate (10) is mounted on a femur (B) via the fixing
plate (20), two ends of the adjusting structure (30) are
respectively connected to the fixing plate (20) and the osteotomy
plate (10), and the osteotomy plate (10) slides left and right
relative to the fixing plate (20) via the adjusting structure (30);
and the osteotomy plate (10) has a femoral osteotomy groove (11)
for performing an osteotomy from four sides and a femoral trochlear
osteotomy groove (12) for performing femoral trochlear osteotomy.
Using the osteotomy device, a femoral trochlear osteotomy operation
can be carried out after performing an osteotomy operation from
four sides without replacing the osteotomy plate (10), thus
effectively reducing the number of instruments and avoiding
repeated disassembly and assembly. In addition, using the adjusting
structure (30), the osteotomy device can conveniently adjust the
osteotomy plate (10) to slide left and right relative to the fixing
plate (20), so as to adjust the osteotomy plate (10) to a position,
directly facing the femoral trochlea, on the femoral trochlear
osteotomy groove (12), thus improving the accuracy of femoral
trochlear osteotomy.
Inventors: |
SUN; Yandong; (Suzhou,
CN) ; HU; Fangqiu; (Suzhou, CN) ; ZHAO;
Kaiyu; (Suzhou, CN) ; WU; You; (Suzhou,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Suzhou Microport Orthorecon Co., LTD. |
Suzhou |
|
CN |
|
|
Family ID: |
1000005050588 |
Appl. No.: |
16/970903 |
Filed: |
March 6, 2019 |
PCT Filed: |
March 6, 2019 |
PCT NO: |
PCT/CN2019/077193 |
371 Date: |
August 18, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61B 17/155 20130101;
A61B 17/56 20130101; A61B 17/151 20130101; A61B 2017/564
20130101 |
International
Class: |
A61B 17/15 20060101
A61B017/15; A61B 17/56 20060101 A61B017/56 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 27, 2018 |
CN |
201810257229.1 |
Claims
1. An osteotomy device, comprising: a fixing plate; an osteotomy
plate configured to be mounted on a femur via the fixing plate; and
an adjusting structure, both ends of the adjusting structure being
configured to be connected to the fixing plate and the osteotomy
plate respectively, the osteotomy plate being capable of sliding in
a left-right direction with respect to the fixing plate via the
adjusting structure; wherein the osteotomy plate has a femoral
osteotomy groove to perform a four-sided osteotomy and a femoral
trochlear osteotomy groove to perform a femoral trochlear
osteotomy.
2. The osteotomy device according to claim 1, wherein upper and
lower ends of the fixing plate are each provided with a latching
tooth, a surface of the osteotomy plate facing the fixing plate is
provided with a sliding groove, the latching tooth is slidably
engaged in the sliding groove, the latching tooth and the sliding
groove are capable of sliding with respect to each other in a
horizontal direction.
3. The osteotomy device according to claim 1, wherein the adjusting
structure comprises: an eccentric wheel connected to the fixing
plate; and a rotary knob connected to the eccentric wheel and
rotatably connected to the osteotomy plate; wherein when the rotary
knob rotates, the eccentric wheel moves eccentrically with respect
to the rotary knob, so as to enable the osteotomy plate to slide in
the left-right direction with respect to the fixing plate.
4. The osteotomy device according to claim 3, wherein the eccentric
wheel comprises: a rotary connecting portion connected to the
rotary knob; and an eccentric portion deviated from a rotation axis
of the rotary knob.
5. The osteotomy device according to claim 4, wherein the fixing
plate is provided with a groove, the eccentric portion is embedded
in the groove; wherein when the eccentric wheel rotates along with
the rotary knob, the eccentric portion is capable of sliding in an
up-down direction along the groove.
6. The osteotomy device according to claim 5, wherein the osteotomy
plate is provided with a cavity penetrating through the osteotomy
plate, the cavity and the groove are communicated to form a hollow
cavity; the rotary knob is located in the cavity; wherein when the
eccentric wheel rotates, the rotary knob abuts against a sidewall
of the cavity to drive the osteotomy plate to slide in the
left-right direction.
7. The osteotomy device according to claim 3, wherein the eccentric
wheel and the rotary knob are capable of moving relatively in an
axial direction, and the eccentric wheel is radially restricted to
the rotary knob, an elastic compression member is provided between
the eccentric wheel and the rotary knob, both ends of the elastic
compression member elastically abut against the eccentric wheel and
the rotary knob respectively.
8. The osteotomy device according to claim 6, wherein the rotary
knob has a stepped shape, one end of the rotary knob adjacent to
the eccentric wheel has an inserting portion, and the other end
thereof has a toothed disc, the rotary connecting portion of the
eccentric wheel is provided with an inserting slot matching with
the inserting portion, an end of the cavity away from the fixing
plate has a toothed opening, the toothed disc is capable of being
embedded in or removed from the toothed opening along the rotation
axis of the rotary knob, when the toothed disc is embedded in the
toothed opening, the toothed opening restricts a rotational
movement of the rotary knob with respect to the osteotomy
plate.
9. The osteotomy device according to claim 5, wherein a bottom
portion of the groove is provided with a through hole penetrating
through the fixing plate.
10. The osteotomy device according to claim 6, wherein an end of
the cavity adjacent to the fixing plate has a restricting groove,
when the eccentric wheel moves to a limiting position that is
required for the adjusting structure to adjust a stroke of the
osteotomy plate, the eccentric wheel abuts against an end of the
restricting groove, such that the eccentric wheel is restricted
from rotating eccentrically.
11. The osteotomy device according to claim 1, wherein a side of
the fixing plate away from the osteotomy plate is provided with a
fixing nail configured to mount the fixing plate on the femur.
12. A method for operating an osteotomy device, the osteotomy
device comprising a fixing plate, an osteotomy plate configured to
be mounted on a femur via the fixing plate, and an adjusting
structure; both ends of the adjusting structure being configured to
be connected to the fixing plate and the osteotomy plate
respectively, wherein the osteotomy plate is capable of sliding in
a left-right direction with respect to the fixing plate via the
adjusting structure; wherein the osteotomy plate has femoral
osteotomy grooves to perform a four-sided osteotomy and a femoral
trochlear osteotomy groove to perform a femoral trochlear
osteotomy, the method comprising: fixing the osteotomy device on
the femur via the fixing plate; adjusting the adjusting structure,
such that the osteotomy plate slides to an appropriate position in
the left-right direction with respect to the fixing plate;
performing the four-sided osteotomy along the femoral osteotomy
grooves; and performing the femoral trochlear osteotomy along the
femoral trochlear osteotomy groove.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of Chinese Patent
Application No. 201810257229.1, entitled "osteotomy device", filed
on Mar. 27, 2018, the entire content of which is incorporated
herein in its entirety.
TECHNICAL FIELD
[0002] The present disclosure relates to a technology field of
medical devices, in particular, to an osteotomy device and a method
for operating the osteotomy device.
BACKGROUND
[0003] In total knee arthroplasty, femoral osteotomy is an
extremely important step. Since an inner surface of existing
femoral prosthesis has four sides and protrudes inward at the
middle portion where a femoral trochlear is located, a doctor needs
to treat a femur into a specific shape corresponding to the
prosthesis, so as to mount the femoral prosthesis. That is, a
four-sided osteotomy is performed on a distal end surface of the
femur (the surface connected to the prosthesis), and the distal end
surface of the femur is formed to have a concave shape at the
femoral trochlear. In this process, whether an osteotomy plate is
firmly fixed, and whether the repeated disassembly and assembly of
the osteotomy plate is accurate will directly affect the effect of
the osteotomy.
[0004] At present, doctors generally need to use different
osteotomy plates for four-sided osteotomy operation and femoral
trochlear osteotomy operation when performing anterior and
posterior femoral condyle treatment. This surgical procedure is
complicated to operate, and repeated disassembly and assembly of
the osteotomy plate is also very easy to reduce the accuracy of the
osteotomy and increase the probability of operation errors.
Moreover, the separate use of multiple sets of osteotomy plates not
only increases the number of devices, but also increases the
manufacturing cost. At the same time, it also increases the
maintenance cost of disinfection and sterilization and repeated
transportation during the use in hospital.
[0005] In addition, unlike the four-sided osteotomy, the position
of the femoral trochlear osteotomy must correspond to the position
of the femoral prosthesis trochlear track, so the fixing position
of the femoral trochlear osteotomy plate is more stringent.
However, the osteotomy plate currently used for the femoral
trochlear osteotomy cannot be adjusted in a left-right direction
after it is fixed, which also increases the difficulty for the
doctor to determine the centering and positioning. Since the
femoral trochlear is the track where a patella slides with respect
to the femur, if the centering position of the femoral trochlear
osteotomy is not accurate and the deviation in the left-right
direction occurs, it will directly affect the position where the
femoral prosthesis is mounted. It will further affect a deviation
of a sliding track of the patella after the prosthesis is reset,
which may cause abnormal patella track, anterior patella pain and
other problems.
SUMMARY
[0006] According to various embodiments of the present disclosure,
an osteotomy device and a method for operating the osteotomy device
are provided.
[0007] According to one aspect of the present disclosure, an
osteotomy device is provided, which includes an osteotomy plate, a
fixing plate and an adjusting structure. The osteotomy plate is
configured to be mounted on a femur via the fixing plate. Both ends
of the adjusting structure are configured to be connected to the
fixing plate and the osteotomy plate, respectively. The osteotomy
plate is capable of sliding in a left-right direction with respect
to the fixing plate via the adjusting structure. The osteotomy
plate has femoral osteotomy grooves to perform a four-sided
osteotomy and a femoral trochlear osteotomy groove to perform a
femoral trochlear osteotomy.
[0008] In one of the embodiments, upper and lower ends of the
fixing plate are each provided with a latching tooth. A surface of
the osteotomy plate facing the fixing plate is provided with a
sliding groove. The latching tooth is slidably engaged in the
sliding groove. The latching tooth and the sliding groove are
capable of sliding with respect to each other in a horizontal
direction.
[0009] In one of the embodiments, the adjusting structure includes
a rotary knob and an eccentric wheel. The rotary knob is connected
to the eccentric wheel and rotatably connected to the osteotomy
plate. The eccentric wheel connected to the fixing plate. When the
rotary knob rotates, the eccentric wheel moves eccentrically with
respect to the rotary knob, so as to enable the osteotomy plate to
slide in the left-right direction with respect to the fixing
plate.
[0010] In one of the embodiments, the eccentric wheel includes a
rotary connecting portion and an eccentric portion. The rotary
connecting portion is connected to the rotary knob. The eccentric
portion is deviated from a rotation axis of the rotary knob.
[0011] In one of the embodiments, the fixing plate is provided with
a groove, the eccentric portion is embedded in the groove. When the
eccentric wheel rotates along with the rotary knob, the eccentric
portion is capable of sliding in an up-down direction along the
groove.
[0012] In one of the embodiments, the osteotomy plate is provided
with a cavity penetrating through the osteotomy plate. The cavity
and the groove are communicated to form a hollow cavity. The rotary
knob is located in the cavity. When the rotary knob rotates, the
rotary knob abuts against a sidewall of the cavity to drive the
osteotomy plate to slide in the left-right direction.
[0013] In one of the embodiments, the eccentric wheel and the
rotary knob are capable of moving in an axial direction with
respect to each other. The eccentric wheel is radially restricted
to the rotary knob. An elastic compression member is provided
between the eccentric wheel and the rotary knob. Both ends of the
elastic compression member elastically abut against the eccentric
wheel and the rotary knob, respectively.
[0014] In one of the embodiments, the rotary knob has a stepped
shape. One end of the rotary knob adjacent to the eccentric wheel
has an inserting portion, and the other end thereof has a toothed
disc. The rotary connecting portion of the eccentric wheel is
provided with an inserting slot matching with the inserting
portion. An end of the cavity away from the fixing plate has a
toothed opening. The toothed disc is capable of being embedded in
or removed from the toothed opening along the rotation axis of the
rotary knob. When the toothed disc is embedded in the toothed
opening, the toothed opening restricts a rotational movement of the
rotary knob with respect to the osteotomy plate.
[0015] In one of the embodiments, a bottom portion of the groove is
provided with a through hole penetrating through the fixing
plate.
[0016] In one of the embodiments, an end of the cavity adjacent to
the fixing plate has a restricting groove. When the eccentric wheel
moves to a limiting position that is required for the adjusting
structure to adjust a stroke of the osteotomy plate, the eccentric
wheel abuts against an end of the restricting groove, such that the
eccentric wheel is restricted from rotating eccentrically.
[0017] In one of the embodiments, a side of the fixing plate away
from the osteotomy plate is provided with a fixing nail configured
to mount the fixing plate on the femur.
[0018] In the osteotomy device, the osteotomy plate includes the
femoral osteotomy grooves to perform the four-sided osteotomy and
the femoral trochlear osteotomy groove to perform a femoral
trochlear osteotomy, such that the femoral trochlear osteotomy
operation can be performed after performing the four-sided
osteotomy operation without replacing the osteotomy plate, which
effectively reduces the number of devices, while avoiding repeated
disassembly and assembly, and simplifying the operation steps. In
addition, the osteotomy device can use the adjusting structure to
conveniently adjust the sliding of the osteotomy plate in the
left-right direction with respect to the fixing plate, so as to
adjust the osteotomy plate to a position where the femoral
trochlear osteotomy groove is directly opposite to the femoral
trochlear, thereby improving the accuracy of the femoral trochlear
osteotomy, avoiding that the incorrect corresponding position of
the femoral trochlear osteotomy results in an abnormal sliding
track of the patella after the prosthesis reset.
[0019] According to another aspect, in present disclosure, the side
of the fixing plate away from the osteotomy plate is provided with
a fixing nail. The fixing nail on the fixing plate can provide an
initial fixing for the osteotomy plate, thus increasing the
stability of the osteotomy plate during the process of adjusting
the centering position of the osteotomy plate in the left-right
direction by a doctor via the adjusting structure. After the
centering is determined, the fixing nail cooperates with a driven
oblique nail to completely fix the osteotomy plate, so as to ensure
the stability during the osteotomy and the accuracy of the
osteotomy.
[0020] According to another aspect of the present disclosure, a
method for operating the aforementioned osteotomy device is
provided. The method includes: fixing the osteotomy device on the
femur via the fixing plate; adjusting the adjusting structure such
that the osteotomy plate slides to an appropriate position in the
left-right direction with respect to the fixing plate; performing
the four-sided osteotomy along the femoral osteotomy grooves; and
performing the femoral trochlear osteotomy along the femoral
trochlear osteotomy groove.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly explain the embodiments of the
present disclosure or the technical solutions in the prior art, the
drawings required in the embodiments or the description of the
prior art will briefly be introduced below. Apparently, the
drawings in the following description are only some embodiments of
the present disclosure. For those of ordinary skill in the art,
without paying any creative work, drawings of other embodiments can
be obtained based on these drawings.
[0022] FIG. 1 is a structural explosive view of an osteotomy device
according to an embodiment.
[0023] FIG. 2 is an assembly structure view of an osteotomy plate
and a fixing plate of the osteotomy device shown in FIG. 1.
[0024] FIG. 3 is a cross-sectional view of the osteotomy device
shown in FIG. 2.
[0025] FIG. 4 is a schematic view of the osteotomy device being
mounted to a femur according to an embodiment.
[0026] FIG. 5 is a cross-sectional view taken along a line A-A in
FIG. 4.
[0027] FIG. 6 is a flowchart of a method for operating the
osteotomy device according to an embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to better understand the present disclosure, the
present disclosure will be described more fully below with
reference to related drawings. The drawings illustrate better
implementations of the present disclosure. However, the present
disclosure can be implemented in many different forms and is not
limited to embodiments as described therein. Rather, providing
these embodiments is to help a more thorough and comprehensive
understanding of the disclosure of this disclosure.
[0029] In order to more clearly describe the structure of the
above-mentioned device, the present disclosure defines the terms
"distal end" and "proximal end". The above-mentioned terms are
common terms in the field of medical devices. Specifically, "distal
end" refers to an end away from the operator during a surgical, and
"proximal end" refers to an end adjacent to the operator during the
surgical. Taking FIG. 5 as an example, the right side of FIG. 5 is
the distal end, and the left side thereof is the proximal end.
[0030] It should be noted that when an element is referred to as
being "fixed on" another element, it may be directly on another
element or there may also be an intermediate element therebetween.
When an element is considered to be "connected" to another element,
it may be directly connected to another element or there may be an
intermediate element therebetween. The "connection" may include a
detachable connection. As used herein, the terms "internal",
"external", "left", "right", and similar expressions are for
illustration only and are not meant to be the only embodiments.
[0031] Referring to FIGS. 1 and 2, an osteotomy device according to
an embodiment includes an osteotomy plate 10, a fixing plate 20,
and an adjusting structure 30. The osteotomy plate 10 is mounted on
a femur B via the fixing plate 20, and is movable in a left-right
direction with respect to the fixing plate 20. That is, the
osteotomy device may adjust a position of the osteotomy plate 10 in
the left-right direction with respect to the femur B, so as to
perform an osteotomy at an appropriate position. Herein, the
position in the left-right direction is defined as below: referring
to FIGS. 1 and 5, the osteotomy device is attached to a distal end
face of the femur B. In a plane where the distal end face of the
femur B is located, a direction parallel to an osteotomy groove 11a
is the left-right direction, that is, a horizontal direction, and a
direction perpendicular to the horizontal direction is an up-down
direction, that is, a vertical direction.
[0032] In this embodiment, the osteotomy plate 10 has femoral
osteotomy grooves 11 for performing a four-sided osteotomy, which,
specifically, are femoral osteotomy grooves 11a, 11b, 11c, and 11d.
The osteotomy plate 10 further has a femoral trochlear osteotomy
groove 12 for performing a femoral trochlear osteotomy. The
adjusting structure 30 is configured to drive the osteotomy plate
10 to slide in the left-right direction, so as to adjust a position
of the osteotomy plate 10 with respect to the femur B, thus
allowing an osteotomy tool such as a sawblade to perform the
four-sided osteotomy along the femoral osteotomy grooves 11a, 11b,
11c, and 11d, respectively, while the femoral trochlear osteotomy
groove 12 allows the osteotomy tool to perform the femoral
trochlear osteotomy.
[0033] In the above embodiment, since the adjusting structure 30
can adjust the position of the osteotomy plate 10 with respect to
the femur B, the osteotomy plate 10 can be adjusted to a position
where the femoral trochlear osteotomy groove 12 is directly
opposite to the femoral trochlear, so as to ensure that the
position of the femoral trochlear osteotomy corresponds to a moving
track of a prosthetic trochlear of the femur B, thereby avoiding
that the incorrect corresponding position of the femoral trochlear
osteotomy results in an abnormal sliding track of the patella after
the prosthesis is reset. In addition, since the osteotomy device
can be used to complete both of the four-sided osteotomy operation
and the femoral trochlear osteotomy operation, that is, after the
four-sided osteotomy operation is completed, the femoral trochlear
osteotomy operation is continued without disassembling and
replacing the osteotomy plate 10. As such, the operation is more
accurate, the surgical time is reduced, the surgical efficiency is
improved, and the case that a four-sided osteotomy plates 10 and a
femoral trochlear osteotomy plate 10 are respectively required to
perform the osteotomy in the conventional total knee arthroplasty
is avoided, which effectively reduces the number of devices,
simplifies the operation steps, and reduces the cost of surgical
and maintenance.
[0034] It should be noted that, in some embodiments, the osteotomy
plate 10 is of symmetrical structure, so as to fit the femur B to
perform the osteotomy operation at the corresponding position. In
this embodiment, the femoral trochlear osteotomy groove 12 is
located at a middle portion of the osteotomy plate 10, such that
when the osteotomy plate 10 is adjusted to a centering portion of
the femur B, the femoral trochlear osteotomy groove 12 is directly
opposite to the femoral trochlear. Such a configuration is
convenient to rapidly adjust the movement of the osteotomy plate 10
in the left-right direction with respect to the femur B to the
femoral trochlear osteotomy groove 12 and position the osteotomy
plate 10 at the centering portion, so as to perform the osteotomy
operation on the femoral trochlear, thereby increasing the
adjusting efficiency, while avoiding the deviation of the position
of the femoral trochlear osteotomy, improving the surgical
effect.
[0035] The osteotomy plate 10 and the fixing plate 20 are each
provided with a sliding connection structure on surfaces (i.e., the
proximal end surface of the osteotomy plate 10 and the distal end
surface of the fixing plate 10) thereof adjacent to each other, and
the sliding connection structures are matched with each other.
Referring to FIG. 3, in some embodiments, upper and lower ends of
the fixing plate 20 are each provided with latching teeth 20a, 20b
that extend in the horizontal direction. A surface of the osteotomy
plate 10 facing the fixing plate 20 is provided with sliding
grooves 10a, 10b that extend in the horizontal direction at a
position corresponding to the latching teeth 20a, 20b. The latching
tooth 20a is slidably engaged in the sliding groove 10a, and the
latching tooth 20b is slidably engaged in the sliding groove 10b.
In this embodiment, since the latching tooth 20a and the latching
tooth 20b on the fixing plate 20 are engaged in the sliding groove
10a and the sliding groove 10b on the osteotomy plate 10 by means
of sliding engagement, when the osteotomy plate 10 slides with
respect to the fixing plate 20, the fixing plate 20 can well
support the osteotomy plate 10 in the up-down direction, such that
the osteotomy plate 10 has a better stability when sliding in the
left-right direction with respect to the fixing plate 20, so as to
ensure the accuracy of the position adjustment of the osteotomy. In
this embodiment, the latching tooth 20a may be a continuous
latching tooth, or may be composed of two or more discontinuous
latching tooth (as shown in FIG. 3). In the latter case, the
latching tooth 20a, as well as 20b, may also be composed of two or
more posts. In some other embodiments, the upper and lower ends of
the fixing plate 20 may be each provided with the sliding groove,
and the surface of the osteotomy plate 10 facing the fixing plate
20 is provided with the latching tooth that is engaged in the
sliding groove. The sliding groove and the latching tooth may also
be replaced with other sliding connection structure, as long as the
relative horizontal sliding between the osteotomy plate 10 and the
fixing plate 20 can be achieved. For example, the joint surfaces of
the fixing plate 20 and the osteotomy plate 10 are each provided
with a slider and a sliding groove that are in a sliding
engagement, such that when the slider slides along the sliding
groove, the osteotomy plate 10 can also slide with respect to the
fixing plate 20, so that when the osteotomy plate 10 is mounted on
the femur B via the fixing plate 20, a relative position of the
osteotomy plate 10 to the femur B can be adjusted in a sliding way
to meet the needs of osteotomy, and the redundant description
thereof will not be made herein.
[0036] In some embodiments, a side of the fixing plate 20 away from
the osteotomy plate 10 is provided with fixing nails 21. The fixing
nails 21 can be used to pre-fix the osteotomy device.
[0037] It should be noted that, the number of the fixing nails 21
is not limited hereto. In this embedment, the number of the fixing
nails 21 is two. The two fixing nails 21 are symmetrically arranged
on the fixing plate 20 in the left-right direction. The fixing nail
21 may be a column-shaped spike, which is convenient to be driven
into the femur B, while having better stability. In addition, nail
holes 13 are inclinedly provided on both sides of the osteotomy
plate 10, such that after adjusting the relative position of the
osteotomy plate 10 and the femur B via the adjusting structure 30,
fasteners such as nails extending through the nail holes 13 can be
driven into the femur B to position the osteotomy device, so as to
ensure the stability during the osteotomy operation and improve the
accuracy of the osteotomy.
[0038] The osteotomy plate 10 is adaptively provided with a hollow
portion to reduce weight. The shape, number and position of the
hollow portion are not limited hereto. A plurality of hollow
portions can be provided without affecting the strength of the
osteotomy plate 10 and the osteotomy operation. In some other
embodiments, an even number of hollow portions can be provided
symmetrically on the osteotomy plate 10. Referring to FIG. 2, in
this embodiment, a side of the osteotomy plate 10 away from the
fixing plate 20 is provided with a T-shaped groove 15, such that
after the osteotomy operation, the osteotomy plate 10 can be taken
out by a tool matching with the T-shaped groove 15, such as a
sliding hammer.
[0039] Referring to FIG. 1 again, the adjusting structure 30
includes a rotary knob 31 and an eccentric wheel 32. The rotary
knob 31 is connected to the eccentric wheel 32, and is rotatably
connected to the osteotomy plate 10. The eccentric wheel 32 is
connected to the fixing plate 20. When the rotary knob 31 rotates,
the eccentric wheel 32 moves eccentrically with respect to the
rotary knob 31, so as to enable the osteotomy plate 10 to slide in
the left-right direction with respect to the fixing plate 20.
[0040] The eccentric wheel 32 includes a rotary connecting portion
321 and an eccentric portion 322. The rotary connecting portion 321
is connected to the rotary knob 31. The eccentric portion 322 is
deviated from a rotation axis of the rotary knob 31. In this
embodiment, the fixing plate 20 is provided with a groove 22, and
the eccentric portion 322 is embedded in the groove 22. When the
eccentric wheel 32 rotates along with the rotary knob 31, since the
restriction of the mutual engagement between the latching tooth 20a
and the latching tooth 20b and the sliding groove 10a and the
sliding groove 10b, the fixing plate 20 and the osteotomy plate 10
will not be displaced in the up-down direction with respect to each
other, while the eccentric portion 322 slides in the up-down
direction along the groove 22. Therefore, when the eccentric wheel
32 moves eccentrically, the changes of the displacement in the
up-down direction does not interfere with the fixing plate 20. It
should be understood that, the groove 22 may be an elongated groove
or a kidney groove with an upward and downward extending
tendency.
[0041] The extending direction of the groove 22 is perpendicular to
the sliding direction of the osteotomy plate 10 with respect to the
fixing plate 20, such that when the eccentric portion 322 moves
with the rotary knob 31, the force between the eccentric portion
322 and the fixing plate 20 is in the left-right direction, which
makes a good sliding effect in the left and right direction between
the osteotomy plate 10 and the fixing plate 20.
[0042] As shown in FIG. 3, the osteotomy plate 10 is provided with
a cavity 10c penetrating through the osteotomy plate 10. When the
fixing plate 20 is engaged with the osteotomy plate 10, the cavity
10c corresponds to the position of the groove 22. That is, the
cavity 10c and the groove 22 are communicated to form a hollow
cavity for accommodating the adjusting structure 30. The rotary
knob 31 is located in the cavity 10c. When the rotary knob 31
rotates, since the eccentric wheel 32 moves eccentrically with
respect to the rotary knob 31, the interaction force of the
eccentric wheel 32 posed on the rotary knob 31 will enable the
rotary knob 31 to abut against a sidewall of the cavity 10c, so as
to drive the osteotomy plate 10 to slide in the left-right
direction with respect to the fixing plate 20 along the sliding
groove 10a and the sliding groove 10b.
[0043] The eccentric wheel 32 and the rotary knob 31 can move
relatively in an axial direction, and the eccentric wheel 32 is
restricted to the rotary knob 31 in a radial direction. An elastic
compression member 33 is provided between the eccentric wheel 32
and the rotary knob 31. Both ends of the elastic compression member
33 elastically abut against the eccentric wheel 32 and the rotary
knob 31, respectively. The axial direction and the radial direction
used herein are defined as blow: referring to FIG. 5, the osteotomy
device is attached to the distal end surface (osteotomy surface) of
the femur B, and a direction perpendicular to the osteotomy surface
(that is, a direction parallel to the rotation axis of the rotary
knob 31) is the axial direction, a direction perpendicular to the
axial direction is the radial direction. The elastic compression
member 33 herein may be a compression spring, or may be an elastic
ring with better contraction capability.
[0044] In this embodiment, since the eccentric wheel 32 and the
rotary knob 31 can move relatively in the axial direction, ends of
the eccentric wheel 32 and the rotary knob 31 away from the elastic
compression member 33 can be respectively pressed to compress the
elastic compression member 33, so as to change an axial distance
between the eccentric wheel 32 and the rotary knob 31, thereby
avoiding that the eccentric wheel 32 interferes the fixed plate 20
when assembling the fixing plate 20 and the osteotomy plate 10. In
addition, after the fixing plate 20 and the osteotomy plate 10 are
assembled, since both ends of the elastic compression member 33
elastically abut against the eccentric wheel 32 and the rotary knob
31, respectively, the eccentric wheel 32 abuts against the groove
22, subjected to the elastic compression member 33. Since the
eccentric wheel 32 is restricted to the rotary knob 31 in the
radial direction, when the rotary knob 31 rotates, the eccentric
wheel 32 will rotate along with the rotary knob 31, so as to enable
the osteotomy plate 10 to slide in the left-right direction with
respect to the fixing plate 20, and adjust the left-right position
of the osteotomy plate 10 with respect to the femur B, so as to
perform the osteotomy operation in an appropriate position.
[0045] A bottom portion of the groove 22 may be provided with a
through hole 22a penetrating through the fixing plate 20. As such,
pressing the eccentric wheel 32 via the through hole 22a will
enable the eccentric wheel 32 to compress the elastic compression
member 33 to be away from the fixing plate 20, and finally move the
eccentric portion 322 of the eccentric wheel 32 out of the groove
22. At this time, the fixing plate 20 is not constrained by the
eccentric wheel 32 in the left-right direction, such that the
fixing plate 20 and the osteotomy plate 10 can slide away from each
other along the sliding groove 10a and the sliding groove 10b.
[0046] The rotary knob 31 may have a stepped shape. One end of the
rotary knob 31 adjacent to the eccentric wheel 32 has an inserting
portion 311, and the other end thereof has a toothed disc 312. The
rotary connecting portion 321 of the eccentric wheel 32 is provided
with an inserting slot 321a matching with the inserting portion
311. It can be understood that the cross-sectional shapes of the
inserting slot 321a and the inserting portion 311 may be
non-circular, such as rectangular, rounded rectangle, etc., so as
to ensure the radial restriction between the eccentric wheel 32 and
the rotary knob 31, while the eccentric wheel 32 and the rotary
knob 31 can move relatively in the axial direction.
[0047] In this embodiment, an end of the cavity 10c away from the
fixing plate 20 has a toothed opening 14. The toothed disc 312 can
be embedded in or removed from the toothed opening 14 along the
rotation axis of the rotary knob 31. When the toothed disc 312 is
embedded in the toothed opening 14, the toothed opening 14
restricts the rotational movement of the rotary knob 31 with
respect to the osteotomy plate 10, so as to lock the relative
position of the osteotomy plate 10 and the fixing plate 20, thereby
avoiding a displacement between the osteotomy plate 10 and the
fixing plate 20 during operation errors or mounting the osteotomy
device.
[0048] It should be noted that, in the above embodiments, when the
rotary knob 31 compresses the elastic compression member 33, the
toothed disc 312 will move out of the toothed opening 14 as the
rotary knob 31 moves toward the fixing plate 20, so as to disengage
the toothed disc 312 from the toothed opening 14, such that the
rotary knob 31 can rotate with respect to the osteotomy plate 10,
thereby adjusting the relative position between the osteotomy plate
10 and the fixing plate 20 in the horizontal direction. In this
way, the femoral trochlear osteotomy groove 12 on the osteotomy
plate 10 is aligned with the femoral trochlear for the osteotomy
operation.
[0049] An end surface of the toothed disc 312 is provided with an
operating portion 321a, so as to rotate the rotary knob 31 with a
tool that cooperates with the operating portion 321a. The operating
portion 321a may be a hexagonal counterbore. Correspondingly, the
rotary knob 31 can be rotated by a tool such as a wrench or a
screwdriver matched with the hexagonal counterbore, so as to drive
the osteotomy plate 10 to slide in the left-right direction with
respect to the fixing plate 20 via the eccentric movement of the
eccentric wheel 32, and adjust the positions of the osteotomy plate
10 in the left-right direction with respect to the femur B, such
that the femoral trochlear osteotomy groove 12 is in the centering
position with respect to the femur B, so as to perform the accurate
osteotomy operation on the femoral trochlear along the femoral
trochlear osteotomy groove 12 via a tool such as a sawblade.
[0050] An end of the cavity 10c adjacent to the fixing plate 20 has
a restricting groove 10d. The restricting groove 10d can be used to
restrict the rotation amplitude of the eccentric wheel 32 with the
rotary knob 31, thereby restricting the relative displacement
between the osteotomy plate 10 and the fixing plate 20, such that
the stroke of the osteotomy plate 10 in the left-right direction
with respect to the femur B can be adjusted appropriately, so as to
prevent the latching tooth 20a and the latching tooth 20b from
sliding out of the sliding groove 10a and the sliding groove 10b
due to too much sliding of the osteotomy plate 10 in the left-right
direction, or to prevent that the contact surfaces of the latching
tooth 20a and the latching tooth 20b with the sliding groove 10a
and the sliding groove 10b are too small to affects the fixation of
the entire device. Specifically, when the eccentric wheel 32 moves
to a limiting position that is required for the adjusting structure
30 to adjust the stroke of the osteotomy plate 10, the eccentric
wheel 32 abuts against the end of the restricting groove 10d, such
that the eccentric wheel 32 is restricted from rotating
eccentrically.
[0051] It should be noted that, in some other embodiments, the
restricting groove can be omitted, while the rotation amplitude of
the eccentric wheel 32 is restricted by designing the size of the
groove 22. Specifically, the groove 22 can be configured in a such
way that when the eccentric wheel 32 moves to the limiting position
that is required for the adjusting structure 30 to adjust the stoke
of the osteotomy plate 10, the eccentric wheel 32 abuts against the
end of the groove 22, and can no longer move eccentrically.
Therefore, a better restricting effect can also be achieved on the
rotation amplitude of the eccentric wheel 32.
[0052] In addition, the stroke of the osteotomy plate 10 that is
driven by the eccentric wheel 32 to slide in the left-right
direction with respect to the fixing plate 20 is also affected by
the deviation of the eccentric wheel 32 from the rotation axis of
the rotary knob 31 when the eccentric wheel 32 itself moves
eccentrically. Specifically, the greater the deviation of the
rotation track of the eccentric portion 322 of the eccentric wheel
32 from the rotation axis of the rotary knob 31, the greater the
displacement of the osteotomy plate 10 that is driven by the
eccentric wheel 32 to slide in the left-right direction with
respect to the fixing plate 20, when the rotary knob 31 is rotated
at the same angle. Therefore, the eccentric wheel 32 can be firstly
selected, and then the eccentric wheel 32 is simulated to drive the
osteotomy plate 10 to slide with respect to the fixing plate 20 to
the limiting position of the preset stroke. At this time, the
design of the size of the groove 22 can be completed by configuring
an end position of the groove 22 to abut against the eccentric
portion 322 of the eccentric wheel 32.
[0053] The width of the osteotomy plate 10 of the osteotomy device
in the left-right direction corresponds to the width of the femur B
to be osteotomized, such that when adjusting the position of the
osteotomy plate 10 with respect to the femur B, the femur B can be
used as the basis for determining the adjusted position, so as to
quickly move the femoral trochlear osteotomy groove 12 on the
osteotomy plate 10 to a position opposite to the femoral trochlear
of the femur B.
[0054] Referring to FIGS. 4 and 5, when using the osteotomy device
to perform the surgical operation, firstly, the size of the femur B
is measured via a size measuring device, and an external rotation
angle thereof is determined. Then, an appropriate type of osteotomy
device is selected according to the size of femur B. A side of the
osteotomy device provided with the fixing plate 20 is attached to
the distal end surface of the femur B, and the fixing nails 21 on
the fixing plate 20 are used to perform a preliminary fixing of the
osteotomy device. The amount of the adjustment in the left-right
direction is determined by the relative positions of both sides of
the osteotomy plate 10 and the internal and external sides of the
femur B. Then, the rotary knob 31 is adjusted by using a hexagon
wrench or similar device, so as to drive the eccentric wheel 32 to
rotate. When the eccentric wheel 32 rotates, the osteotomy plate 10
is driven to move to an appropriate position in the left-right
direction. After the adjustment is completed, oblique nails are
driven into the femur B via the nail holes 13 on the osteotomy
plate 10, so as to fix the osteotomy plate 10, such that the
osteotomy plate 10 is firmly fixed by the fixing nails 21 and the
oblique nails, thereby avoiding osteotomy errors caused by
loosening. Then, the four-sided osteotomy is performed sequentially
along the four femoral osteotomy grooves 11a, 11b, 11c, and 11d by
using the sawblade. After the four-sided osteotomy is completed,
the femoral trochlear osteotomy can be performed along the femoral
trochlear osteotomy groove 12 by the sawblade, or treated by a
matching U-shaped bone chisel. After the osteotomy operation is
completed, the oblique nails are firstly taken out, and then the
osteotomy plate 10 is taken out via the T-shaped groove 15 on the
osteotomy plate 10 by an extraction tool such as sliding hammer, so
as to perform a reset operation on the subsequent femoral B
provisional.
[0055] Referring to FIG. 6, an embodiment of a method for operating
an osteotomy device is illustrated. In this embodiment, the
osteotomy device is an osteotomy device as described in any one of
the embodiments. The osteotomy device is mounted by the method, and
thus the surgical operation is performed. Specifically, the method
includes the following steps.
[0056] In step S200, the osteotomy device is fixed on the femur via
the fixing plate.
[0057] In step S400, the adjusting structure is adjusted, such that
the osteotomy plate slides to an appropriate position in the
left-right direction with respect to the fixing plate.
[0058] In step S600, the four-sided osteotomy is performed along
the femoral osteotomy grooves.
[0059] In step S800, the femoral trochlear osteotomy is performed
along the femoral trochlear osteotomy groove.
[0060] The steps have been set forth in detail in the above
descriptions, and the redundant description thereof will not be
made herein.
[0061] It should be noted that, it should be understood that
although the steps in the flowchart in FIG. 6 are shown in sequence
according to the arrows, the steps are not necessarily performed in
the sequence indicated by the arrows. Unless clearly stated in the
context, performing these steps is not strictly limited in
sequence, and these steps can be performed in other sequences.
Moreover, at least some of the steps in FIG. 6 may include multiple
sub-steps or multiple stages. These sub-steps or stages are not
necessarily performed at the same time, but may be performed at
different times. The performing order of these sub-steps or stages
also does not have to be performed in sequence, but may be
performed in turn or alternately with at least some of other steps
or sub-steps or stages of other steps.
[0062] Each technical features of the above embodiments can be
arbitrarily combined. For simplifying the description, all possible
combinations of each technical features in the embodiments are not
described. However, as long as there is no contradiction in the
combination of these technical features, they should be fallen
within the scope of this description.
[0063] Only several embodiments of the present disclosure are
illustrated in the embodiments, and descriptions thereof are more
specific and detailed, but they should not be construed as limiting
the scope of the disclosure. It should be noted that, for those
skilled in the art, several modifications and improvements can be
made without departing from the concept of the present disclosure,
which all fall within the protection scope of the present
disclosure. Therefore, the protection scope of the disclosure shall
be subject to the appended claims.
* * * * *